Clinical Case is an application for exploration of clinical data represented in SDTM format.
The main goal of the application is to provide users who deal with clinical trials data (such as bio-statisticians, clinical trial investigators, data scientists, site managers and other groups of users) with an effective, flexible and user-friendly tool which helps to analyze data from different perspectives and on different levels (such as study, site or patient level). Clinical Case provides such capabilities through a number of predefined views with various visualizations.
For details also refer to introduction video.
Clinical case automatically detects data represented in SDTM format. For instance, if you have a folder containing a bunch of SDTM domains (csv files), you will be offered to launch the application. Also study ID is shown on a panel below files explorer.
Launch the application by clicking Run ClinicalCase.
View contains basic information about the study and subject population. Here you can find number total number of subjects and sites along with the cumulative enrollment line chart which is useful to assess the enrollment dynamics throughout the study.
'Errors' section contains number of errors revealed by validation process in each domain. Validation of SDTM tables (domains) is performed once at the start of application. By clicking on errors number you will be redirected to Validation view.
Also there is a couple of charts with essential population characteristics – age, race, sex, treatment arm – which can be used to assess their distribution within population. Charts are interactive and linked with each other. For instance, by clicking on 'M' sex the other charts will show the proportion of male subjects.
In case trial is registered on clinicaltrials.gov context panel on the right will basic study information extracted from database along with the link to the study on clinicaltrials.gov.
Timelines view allows to visualize events flow in time. X axis is time axis reflecting study days. On Y axis there are subjects. Events are shown either as a point(in case event lased for one day) or as a line (for cases events were prolonged in time)
Adverse events, investigational drug exposure and concomitant medication domains are available for analysis(in case SDTM data contains corresponding tables). Filters can also be applied for each domain.
By zooming in and out you can drill down to particular patient and event or otherwise see the picture of events in general.
Information about particular event is shown in tooltip on mouse hover.
Several domains can be shown simultaneously on the graph. For instance, the following screenshot shows severe general and cardiac disorders VS aspirin intake.
Patient profile is useful for analyzing events related to particular patient. You can analyze data from laboratory, adverse events, dug exposure and concomitant medication domains in time and see relations between events. All graphs are linked to the same X axis representing study days and it can be zoomed in and out simultaneously.
Information about events is available in tooltips on mouse hover. For convenience domains can be collapsed or extended.
- Lab values chart
By clicking on settings button you can choose laboratory values to show on chart. List of available values is extracted from 'lb' domain in provided SDTM data.
Values within normal ranges are colored green, values outside normal ranges are red.
- Lab values line chart
You can also choose laboratory values by clicking settings button.
Laboratory line chart provides the following of calculating values dynamics:
- Relative changes from baseline
- Relative values between min and max contained in dataset
- Relative changes between normalized normal ranges
View to explore Adverse events domain. Contains couple of charts along with Adverse events table view.
- All events
Plots all adverse events registered during the study. Detailed information is available in tooltip. Also when selecting Adverse event on the plot corresponding row becomes current in Adverse event table. So Adverse event of interest can easily be analyzed in details. Selection also works vice versa - when selecting a row in a table corresponding Adverse event is selected on a scatter plot.
Scatter plot can be zoomed in and out to drill down to particular patient or see picture in general.
Color indicates severity of an Adverse event.
- Events per week
Histogram with number of Adverse events occurred per week throughout the study. Can help to analyze overall dynamics of Adverse events occurrence.
Color corresponds to severity of an Adverse event.
- Barcharts
There are barcharts plotting events distribution by Type, Body system, Causality and Outcome.
Color corresponds to treatment arm. So you can visually assess proportion of each treatment group.
Barcharts are also interactive. By selecting one of the groups in a barchart (for instance, adverse events related to study drug for patients who took placebo) corresponding rows will be selected in the table and 'All events' scatter plot.
This view contains several specific charts for analyzing laboratory results.
Scatter plot for analyzing possible risk of a fatal drug-induced liver injury.
Shows peak bilirubin values versus peak ALT/AST values across the study. Reference lines are shown at 3ULN for ALT and AST and 2ULN for Bilirubin. Possible Hy's law is defined as AST or ALT >= 3ULN with bilirubin >=2ULN.
Color corresponds to treatment arm.
- Baseline endpoint
Scatter plot which shows ratio between laboratory values at some selected baseline and endpoint timepoints.
Scatter plot is divided to 9 parts each of which is annotated with corresponding ration. For instance 'Normal-High' quadrant corresponds to subject who had laboratory value within normal ranges baseline visit but ended up with increased value at endpoint. Thus it can be useful, for example, to identify groups of subjects who developed increasing of some laboratory values compared to baseline or vice versa who started with values out of range but ended within normal ranges.
Baseline, endpoint visits as well as laboratory value can be selected using dropdown lists above the scatter plot.
Color corresponds to treatment arm.
- Laboratoty distribution
This box plot shows distribution of selected laboratory value among all subjects depending on study day. In particular you can analyze median, min and max values, upper and lower quartiles and detect outliers. Additionally you can evaluate difference between distributions on different study days.
Laboratory value as well as study visit can be selected via dropdown lists above box plots.
- Results
This tab contains laboratory domain table.
This view is designed to create Kaplan-Meier curves and perform covariates analysis.
Steps to perform survival analysis:
- create dataset (
Datasettab)
Choose endpoint for which you want to create Kaplan-Meier curve. Optionally you can include basic covariates(age, sex, race, treatment arm) into dataset. Click Create dataset button.
Dataset can be further filtered.
- go to
Survivaltab. You will see Kaplan-Meier curve. You can modify confidence interval or choose strata(stratas will be available in dropdown list in case covariates for dataset are selected). After modifying parameters curve will be updated.
In case you want to perform covariates analysis you should go to Covariates tab and check one or several covariates.
The view shows distribution of selected biomarker values for all subjects at selected visit splitted by selected parameter. It is useful to evaluate median, upper and lower quartiles and outliers. And since distributions in each boxplot can be grouped by certain parameter it is also possible to evaluate difference in biomarker values distribution between different groups.
By default 4 biomarkers with min p-value at the earliest study visit splitted by treatment arm are shown. Baseline visit, split parameter as well as biomarkers can be further changed via dropdown lists and settings button above the boxplots.
Correlation matrix showing relations between biomarkers values for all subjects at the selected visit.
On diagonal you can see histograms showing biomarker distribution. Cells at the intersection of certain biomarkers contains correlation coefficient for that pair of biomarkers. By hovering mouse over correlation coefficient you will see scatter plot with corresponding biomarkers values in a tooltip.
By default correlation matrix is created for whole list of biomarkers at the earliest study visit. Visit as well as biomarkers can be further changed via dropdown list and settings button above the boxplots.
This view contains line chart which allows to evaluate laboratory dynamics in time. X axis is time axis showing days of study. Y axis is biomarker level scale.
There are 2 types of chart representation:
- Non-normalized biomarkers results
- Relative changes from baseline
Type of graph and required visits can be selected in the ribbon panel above chart.
Line chart is splitted by treatment arm by default. But parameter to split by can be changed as well as biomarker itself.
Each value on the line is drawn in form of distribution. By default points represents median, whiskers represent upper and lower quartiles. Type of distribution can also be changed in context panel.
This view is useful for exploring adverse events in details including preceding events from domains other then ‘ae’.
The view is basically 'ae' domain table which contains list of all registered adverse events. The table can be filtered.
By selecting row in a table the following information will be displayed on a context panel:
- subject ID (in a tooltip on mouse hover you will see basic demographic characteristics - age, sex, race, treatment arm)
- AE name preceded by AE severity
- Days of study in which AE occurred (in a tooltip on mouse hover you will see real AE dates)
- input with number of days before AE for which you want to analyze events in other domains (by default it's 5)
- list of expandable domain panels which contains rows with events occurred during selected period before the AE (by default adverse event, drug exposure and concomitant domains are selected, but you can add other domains by clicking on
+button)
The view contains results of SDTM tables validation performed at the start of the application.
In the upper table there is a whole list of violated rules. In the lower table there are tabs with domains in which rules have been violated. Table in each ta contains rows with violated rules.
By selecting a row in the upper table the lower table will be filtered by the selected violated rule.
